FR2512426A1 - SILO-GAS SEAL COMPRISING A DEVICE FOR THE DISPOSAL OF BULK MATERIALS NOT FLOWING SPONTANEOUSLY - Google Patents

Abstract

GAS-TIGHT SILO-TOWER INCLUDING AN EVACUATION DEVICE FOR BULK MATERIALS THAT DOES NOT FLOW SPONTANEOUSLY. IN THIS DEVICE, THE BULK MATERIAL FROM THE UPPER LAYER OF THE MOMENT OF THE SAID MATERIAL IS PROVIDED TO AN AXIAL GRAVITY WELL INCLUDING A REMOVAL DEVICE AT ITS LOWER PART AND THE INVENTION CONSISTS OF AN AXIAL WELL ASSOCIATED WITH THE SILO-TOWER GAS-TIGHT, RIGID, FIXED, TUBULAR AND CAPABLE OF BEING CLOSED AT ITS LOWER PART, ON THE HEIGHT AND ON THE SIDE SURFACE OF WHICH ARE ALLOCATED CUTS OF WHICH AT LEAST ONE IS AT EACH LEVEL OF THE MOMENT OF THE BULK MATERIAL. THE SILO ACCORDING TO THE INVENTION IS MORE SPECIFICALLY INTENDED FOR BULK MATERIALS NOT FLOWING SPONTANEOUSLY.

Description

1 - The present invention relates to a tower silo

  gas-tight, with a breathing bag and

  born to receive bulk materials which do not flow freely

  at the same time, which are fed, from the upper layer of material, to a vertical axial gravity well by at least one feed device distributing the material during the filling of the silo, comprising removal members moving the latter radially from

outside inwards.

  It is known to remove from a silo-tower the materials not flowing spontaneously by moving each time

  periodically the upper layer radially from the outside

  towards the inside -by means of

  in the direction of the orifice of a pneumatic suction pipe or of an axial gravity well associated with a lower transverse conveyor In the first case, the flow rate of the pneumatic conveying is limited and it is therefore more advantageous to execute the kidnapping at

  using an axial gravity well because it is then possible to

  to obtain large flows at the time of removal by

  mechanical conveyors at the bottom and iron

  seal the silo tightly at its top.

  In such cases, it appears during the filling of the silo and depending on the nature of the filling material gases that consume the oxygen present in the silo or that are pushed from the top of the silo in a breathing bag or , passing through valves

direction from the outside.

  The object of the invention is to associate a gas-tight tower silo with an assembly intended for the removal of loose materials which do not spontaneously flow, such as mixtures of milled or unmilled maize stalks or products analogues, which includes a gravity well, of which

  the construction is particularly simple and does not

  does not require moving elements or mechanisms.

  This object is achieved according to the invention in combination with

2 -

  gas-tight silo-tower a gravity well

  gide, fixed, tubular, which can be closed at its

  a transverse section chosen at will, which terminates above the highest level of the material in the silo and on the height and the lateral surface of which there are distributed cutouts of which at least one is at each level height of the moment of matter

descending by clearing.

  It follows from this solution that henceforth

  bulk material in large quantities by the gravity well is possible and that said gravity well remains permanently intact as such throughout its height,

  but that in spite of this the material not flowing spontaneously

  may be brought to it by the bodies

  rotating, so that it falls up and down the well and can be removed in this case by a known transverse mechanical conveyor.

  to speed up the evacuation of the silo, to increase the di-

  meter or the height of the removal devices of the

  feeding device near the well, or lowering them relative to the other removal bodies so that these organs generate near the well-during the rotation hollow lin dehlaiement from the surface

  of material, with its tip pointing downwards in

  shaft axis and thereby bring the man-

  to the well on a greater height across the

  cutouts A larger quantity of tomato material

  well can be picked up without more and be removed from the transverse mechanical conveyor set up in

  this case below the well.

  Thanks to the closed gas-tight silo with

  breathing bag and gravity well that can be

  at the bottom, the filling material

  in the momentary upper layer remains cool in

  and can not be altered as it is possible

  to close the inner transverse channel for the removal of material by a drawer or a device

  similar, so that no air or oxygen

  It is possible to add to the mechanical devices an additional closure of the gravity well, as is the case in this direction.

described below.

  The rigid embodiment of the gravity well

  allows to achieve it with a cross section chosen

  at will, a particularly simple construction being possible with a section with four or more sides,

as explained below.

  The invention will be described in more detail with regard to

  annexed drawings as examples which are in no way

  FIG. 1 is a diagrammatic vertical section of a circular silo tower comprising the gravity well according to the invention, during the evacuation of the silo;

  Figure 2 is a schematic cross-section

  than enlarged, along the line II-II of Figure 1; Za is a cross section of a gravity well along the line III-III of FIG.

  FIG. 4 is a perspective view of an elementary

  sheet metal for the realization of the gravity well; Figure 5 is a partial vertical section of the well wall along the line V-V of Figure 3; Figure 6 is a modified "development" of a portion of the height of the well, with helical mounting of the sheet metal members;

  Figure 7 is a plan development of a

  of the height of the well according to Figure 3; Figure 8 is a cross section of an octagonal gravity well; Fig. 9 is a partial side view of the gravity well as viewed in the direction of arrow IX of Fig. 8; -4-

  FIG. 10 is a representation, corresponding to

  Figure 1, with an overlay of the gravity well

when filling the silo;

  Fig. 11 is an enlarged side view of the recess

  gravity well cover; Za FIG. 12 is a side view of the covering,

  viewed from line XII-XII of Figure 11.

  According to the invention, one has set up in a si 1 -

  turn 1 comprising a breathing bag an axial 4 fatty well, in the form of a fixed rigid tube, of which 13 cross section is any The tube 4 opens at the bottom in a transverse channel 5 already known, in which is mounted a mechanical transporter 6 substantially closing the well 4 at its lower part, on which the material from the gravity well 4 falls and is brought to the place

  The channel 5 can be closed

  known by a drawer not shown to prevent outside air from entering the channel 5 and the well 4 in the upper part of the silo 1 The gravity well 4 ends at its upper part in the silo 1, in

  all cases above the highest level of the

to be poured.

  In the embodiment shown, the gravity well 4 is constituted by four support profiles 4a, 4b, 4c and 4d, for example in the form of angles which surround a square and whose edges are turned towards It may be advantageous for the areas

  square cross-sections surrounded by

yarns grow up and down.

  Above a given height, calculated from the bottom of the silo, the spaces 7 between, each time,

  two profiles 4 a, 4 b and 4 c, 4 d remain free and elements

  vertical sheet metal parts 8, whose bent sides (FIG. 4) alternate with these free surfaces 7 open on the lateral surface and can be connected by this means to the corresponding branches of the two connected sections 4b, 4c and 4 a, 4 d Therefore two free spaces 7 facing each other and two facing sheet metal members 8 form a ring and such rings are superimposed to above the level of the material in the silo in such a way , above this level, free surfaces 7 and elements of

  8 overlap or overlap in part.

  this free surfaces 7 and sheet metal elements 8 is visible on the development of the well of FIG. 6 It is also possible to use, in place of sheet metal planar elements 8, sheet metal elements curved so as to form a cylinder as shown in the lines

interrupted in Figure 3.

  It is obviously possible to increase the number

  support profiles 4a, 4b, so that these

  possibly delimit a cross-section

  circular or polygonal It is also possible, according to

  8 and 9, proceed in such a way that the profiles of

  are angles 4 to 4 d whose edges are

  born outwardly united with the branches of these

  profiles, corner elements 8a below

  free faces 7a whose edges are also facing outwards This advantageous embodiment of the well

  4 then an octagonal cross-section and

  close to a circular cross section.

  On the lateral surface of each ring it is necessary

  replace at least one element 8 or 8a made of sheet metal by a superstructure

  free face 7 or 7 so that the material advances during each rotation of the transport members 3 above such a free surface or cutout 7, 7a in the gravity well 4 Si, according to Figure 3, two free surfaces 7, 7 a are provided for each ring, the material must be

  trained each time on 1800 by the trans-

  port 3, until it is brought inside the well 4 As mentioned above, it is also

  possible to mount the free surfaces 7, 7 a and the

  Alternating sheet metal parts so as to form a helix as shown by the development of the well according to FIG. 6 In any case, it must be in the present case, as in all other cases, at each level of slaughter of the material, at least one free surface 7, 7a or an opening 7, 7a, the free surfaces 7, 7a and the sheet metal members 8, 8a can also overlap somewhat like the

shows figure 7.

  As mentioned above, it is possible to close the lower end of the gravity well 4 by a drawer or the like to prevent any

  air intake towards the upper part of the silo.

  But we can also proceed to realize with or

  without the drawer closure additional sealing.

  This result is achieved by placing in the gravity well

  4, at a suitable height, measuring devices 4 e (shown schematically in FIG. 1). If, then, the transverse conveyor 6 at the bottom is

  shut down, the transport devices 3 for the removal

  The material thus continues to operate for a short time, which means that material from the silo reaches the gravity well 4; this matter is no longer removed from the lower part; but

  form at this point of the gravity well a plug of

  As soon as this plug or the material that goes up into the

  well 4 arrives at the level of the measuring devices 4 e, those

  They emit a pulse by which the drive by the upper feeders 3 is interrupted. The plug then remains at the lower part of the gravity well and thus forms a seal which prevents air

  outside to access the upper part of the silo.

  For the filling of the silo 1, for example by the feed pipe 2 or a mechanical conveyor,

  the angle of inclination of a part of the

  Feeding devices 3 with upward displacement depending on the degree of filling are inverted, so that by this means the incoming material is distributed.

  evenly on the surface of the filler.

  When the material is introduced into the silo, small amounts of material can reach the well 4 through the cutouts 7, 7a.

  part of this, the feeders 3 serving as

  titers are connected to a recovery device 10

  demountable surrounding the well 4 (Figure 10), which is

  lifted at the same time as the feed devices 3 and

  fishing near the upper layer of the moment of

  the material penetration into the well by the discoveries

  7, 7 has material transported in the silo Since, in the case of the invention, bulk material does not flow spontaneously, the material remains

  below the overlap 10 with upward movement.

  According to FIGS. 11 and 12, the covering 10

  consists of a cylinder 10 resulting from the assembly

  two half-cylinders 10a, 1b, joined by

  flange 11, which widens in such a way as to form

  sea a cone at its upper part and is provided at this location eyelets 12 or similar elements, thanks

  to which it is connected by ropes or similar means

  to the feed devices 3 to move upwards.

  The cover 10 can be removed by loosening the

  flange connections 11 after silo filling, in sepa-

  the two half-cylinders of each other.

  It goes without saying that the present invention has been described only as an indication and is not limiting, and that it is capable of various variants without departing from its

frame.

8 -

Claims (11)

  1. Gas-tight, gas-tight silo-tower   piracy, intended to house bulk materials, does not   not spontaneously, which are brought from   nance of the upper layer of materials, to a   vertical central gravity by at least one device   spreading these during filling of the silo,   with moving bodies moving radially   materials from the outside to the inside,   characterized in that a gravity well (4) rigid, fixed, tu-   bung, of any section, that can be closed at its   lower part is associated with said silo-tower, and   mine above the highest level of matter in   the silo (1), and on the height and lateral surface of the   what are the divisions (7, 7 a), among which   the at least one is at each height of the level of   moment of matter falling by the clearing.   2. An assembly according to claim 1, characterized   in that the feeding device (3) comprising   removal can rotate in both directions and move upwards and is joined to an overlap 410)   removable shaft surrounding the well (4) which prevents   of the upper layer of the moment, all penetrated   in the well (4) by the cutouts (7, 7 a) of the material arriving in the silo.   3. An assembly according to claim 2, characterized in that the cover (10) is a cylinder constituted by two half-cylinders (1 Oa, 1 Ob) to be joined separably. 4 An assembly according to claim 1, characterized in that the devices for clearing the device, or devices, supply (3) near the well (4) are made or mounted so as to produce in the vicinity of the well, when their rotation, a hollow of material starting from the surface thereof, with its point oriented towards   down towards the axis of the well.   9 - 5. An assembly according to claim 1, characterized   in that the gravity well (4) is produced by the assembly   forming rings or horizontal turns placed one above the other, consisting of solid vertical sheet elements (8, 8 a) distributed over the lateral surface and at least the removal of a sheet metal element (7, 7 a) or the presence of a cutout for each ring or each turn.   6. Set according to claims 1 and 5 taken   as a whole, characterized in that elements   sheet metal (8, 8 a) and surfaces (7, 7 a) without   said elements alternate with each other.   7. An assembly according to claim 1, characterized   in that the solid sheet metal elements (8, 8 a) and the   free faces (7, 7 a), or the removed sheet metal elements form with the arrangement of turns, the well (4) to gravity.   8. An assembly according to any one of the claims   1, 4, 5, 6, 7, characterized in that the gravure well is   (4) has a roughly circular cross-section   rectangular, or polygonal, and is made   firing of support profiles (4 a-4 d) distributed on the surface   this or in angles in the sense of the height of all   rings or turns, among which those which are   sins are bridged by sheet metal elements (8, 8 a) planes, bent and with angles, or without elements in jail.   9. An assembly according to claim 8, characterized in that the support profiles (4a, 4b, 4c, 4d) are angles with an edge directed towards the interior of the well and can be joined, for example screwed , by   folded edges of their wings to the sheet metal elements (8).   10. An assembly according to claim 8, characterized in that the support profiles (4 a-4 d) and the sheet metal elements (8) are angles with an outwardly oriented ridge and that the wings of the elements in sheet metal -   can be joined to the wings of the support profiles.   11. An assembly according to any of the claims   cations 1 and 4 to 10, characterized in that, in addition to a   nal lower oblique (5) removal of the material from the well (4), a drawer can close it in a known manner, at least one measuring member (4 e) is placed in the well (4). ), and measures the maximum height of a plug of material forming in the well when the lower removal device (6) is put out   of action, and stops the feed device (3) from the well (4).